AD8612ARU

Overview

The AD8612ARUZ is a dual ultrafast comparator manufactured by Analog Devices Inc. It operates on a single supply voltage ranging from 3 V to 5 V and features a propagation delay of 4 ns typical, with a maximum of 5.5 ns at 5 V. The device includes a latch function that requires VCC greater than 4.3 V for operation. It provides complementary outputs capable of sourcing or sinking up to 10 mA per channel. The input common-mode range extends down to the negative supply rail. It is housed in a 14-lead TSSOP surface-mount package and is rated for an industrial operating temperature range of -40°C to +85°C.

Feature Summary

• Features a latch function to maintain constant output states independent of subsequent input changes when enabled.
• Provides complementary digital outputs for each channel to interface directly with logic circuits.
• Offers closely matched propagation delays for rising and falling signals across the operating temperature range.
• Supports single-supply operation with an input common-mode voltage range extending to the negative supply rail.

Applications

• High speed timing circuits
• Clock recovery and clock distribution systems
• Line receivers
• Digital communications phase detectors
• High speed analog-to-digital converter (ADC) interfaces

Procurement Notes

Verify the specific suffix ARU corresponds to the 14-lead TSSOP package configuration required for your layout. Confirm that the application voltage remains above 4.3 V if the internal latch functionality is utilized, as the feature becomes inactive below this threshold. Ensure ESD precautions are observed during handling due to the sensitivity of the CMOS input stage.

Selection Notes

Select the AD8612ARUZ when a dual-channel solution is required for high-speed signal comparison. This part is suitable for replacing LT1394 or LT1016 designs where lower power consumption and wider input common-mode ranges are needed. Consider the 14-lead TSSOP footprint constraints and verify that the 10 mA output drive capability meets the load requirements of the downstream logic gates.

Part Context

The AD8612 is the dual-channel version of the AD8611 single-channel comparator. Both devices share identical electrical characteristics, including the 4 ns propagation delay and latch functionality. While the AD8611 is available in 8-lead SOIC and MSOP packages, the AD8612 utilizes a 14-lead TSSOP package to accommodate two independent comparator channels within a compact surface-mount form factor.

Replacement Considerations

The AD8611 serves as the single-channel equivalent within the same family. Designs originally using LT1016 or LT1394 comparators can be upgraded to the AD8611/AD8612 series for improved propagation delay and reduced supply current, provided the input voltage range and bias current directions are accounted for in the system design.